set term postscript enhanced color
set output "fig2.eps"
set size .5,.5
unset log                              # remove any log-scaling
unset label                            # remove any previous labels
set xtics 0,1 
unset ytic
#set xlabel "values"
set ylabel "cumulative probability"
set arrow from 0.5,.4 to 0.5,.6
set arrow from 0.5,.6 to 0.5,.4
set label "1/s" at .55,.5
set label "v_i" at .4,-.05
set label "v_{i+1}" at .7,-.05
set xr [0:1.0]
set yr [0:1]
plot "lb.dat" using 1:2 notitle with steps, "lb.dat" using 1:3 notitle with steps
